Yes, hello all. Greetings, Dopers who shared their vast experience and suggestions with me. I stand before you fairly humbled.
A week or two ago, I had to replace the sidewall-mounted muffin fan that provides overall cooling to the motherboard. The bearings were shot, and it was vibrating.
As I sat here, having every piece of software in the machine crash within a few seconds of loading it up, it occurred to me that perhaps something was amiss physically, not electronically.
I took off the side panel, and removed the cord going to the motherboard that powers the muffin fan. I believe that when I installed the fan, I must have knocked against the stiff ribbon cable that connects BOTH hard drives to the motherboard. The plastic connector on the ribbon cable was partially detached from it’s pin connector on the motherboard.
Oh, don’t worry, I have saved you all the trouble of cursing me out, by doing it to myself. Arrgh, I felt like an idiot. Now, it didn’t guarantee that this was the problem, but it gave me a road to travel that I’d not previously considered. ( And, should have ). I put my wrist grounding strap on, and got busy. I pulled and reseated both RAM chipsets. I wiggled gingerly in the fan locked to the CPU, so it was seated well. I reseated the two cards I have in the machine. And, of course, I pulled and reseated ALL ribbon connectors to all devices.
It’s been about a day and a half and the machine hasn’t burped once. Unless it’s just been an unusually long run before the intermittent returns, I believe that that partially pulled ribbon cable connector was the culprit.
Thank you for the most excellent advice, all. I will print this thread ANYWAY, because at some point, such ills befall us all and it really will be a software issue.
------Color me ruefully red,
Cartooniverse